Chapter 8.3, Problem 84E

To determine

To find out which of the following would cause the most worry about the validity of this interval.

Answer to Problem 84E

Option (a) is the correct option.

Explanation of Solution

In the question it is given that scientists collect data on the blood cholesterol levels of a random sample of $24$ laboratory rats. Thus, the biggest problems for the use of the t -procedures are strong outliers and strong skewness. As not knowing the population standard deviation $\sigma$ is assumed in the t -procedure. Thus the most worrying about the validity of this interval is option (a) that is, there is a clear outlier in the data. Thus, option (a) is the correct option.